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P2220
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Powertrain (Diesel Emissions)
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Full-system scanner (engine, ABS, SRS, transmission, service resets)

NOx Sensor Current Low (Bank 1 Sensor 1)

Understand P2220, common causes, and the right TOPDON scanner to diagnose it.

NOx sensor cell current below expected range.

Veelvoorkomende symptomen

  • False SCR efficiency codes
  • Check engine light

Typische oorzaken

  • Aging NOx sensor
  • Contamination on probe
  • Exhaust leak before sensor

Welke scanner heb je nodig?

Full-system scanner (engine, ABS, SRS, transmission, service resets)

Gebruik live data en freeze frame voordat je onderdelen vervangt. ABS-, SRS- en U-codes vereisen meestal een full-system scanner.

Diagnosetips

  • Leg freeze frame vast wanneer de code voor het eerst verschijnt
  • Wis de code pas na het oplossen van de oorzaak
  • Controleer op gerelateerde pending codes
  • Controleer of accuspanning boven 12,4 V is voordat je sensoren suspecteert

Aanbevolen TOPDON scanners

Veelgestelde vragen

What does P2220 mean?
P2220 indicates nox sensor current low (bank 1 sensor 1). NOx sensor cell current below expected range.
Can I diagnose P2220 with a basic code reader?
P2220 may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Which TOPDON scanner do I need for P2220?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with P2220?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.